Maytag ATB1935HRW & Q User manual

This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
16021832
Revision 0
August 2002
Service
Service Manual for Amana® models
This Manual covers 19,21 u. Ft.
Top Mount Refrigerators
See page i for model listings
19 & 21 Cu. Ft.
Top Mount
Refrigerators

2002 Maytag Corporation

SAFETY PRECAUTIONS
THIS MANUAL, AS WELL AS THE INFORMATION CONTAINED IN IT, IS TO BE USED
ONLY BY A MAYTAG AUTHORIZED SERVICE TECHNICIAN FAMILIAR WITH AND
KNOWLEDGEABLE OF PROPER SAFETY AND SERVICING PROCEDURES AND POS-
SESSING HIGH QUALITY TESTING EQUIPMENT ASSOCIATED WITH MICROWAVE,
GAS, AND ELECTRICAL APPLIANCE REPAIR.
ALL INDIVIDUALS WHO ATTEMPT REPAIRS BY IMPROPER MEANS OR ADJUST-
MENTS, SUBJECT THEMSELVES AND OTHERS TO THE RISK OF SERIOUS OR FATAL
INJURY.
USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTS.
Safety Precautions

2002 Maytag Corporation
INTRODUCTION
This refrigeration service manual provides the information necessary to service Top
Mount model refrigerators.
NOTE: ALL MODELS COVERED IN THIS SERVICE MANUAL USE R1 4A REFRIG-
ERANT
The manual is printed in loose leaf format. Each part of this manual is divided into
sections relating to a general group of components and each section is subdivided into
various parts describing a particular component or service procedure.
The subdividing of the subject matter plus the loose leaf form will facilitate the updating
of the manual as new models and new or revised components of service procedures are
introduced.
Each page of this manual will be identified in the lower right hand corner. As new or
revised pages are published, it will be easy to keep the manual up to date.
This service manual is a valuable service tool and care should be taken to keep it up to
date by prompt and proper filing of subsequent pages as they are issued.
The following models are covered in this service manual:
INTRODUCTION i
Continued...
AMA A
ATB1935HRW & Q
ATB2135HRW & Q

2002 Maytag Corporation

INTRODUCTION ii

2002 Maytag Corporation
CONTENTS
SECTION 1. GENERAL INFORMATION................................................. 1-1
Electrical Requirements .................................................................................................. 1-1
Forced Air ....................................................................................................................... 1-2
Checking Operation ........................................................................................................ 1-3
Tools eeded For Sealed System Repair ....................................................................... 1-5
Refrigeration System ....................................................................................................... 1-8
Diagnosis ..................................................................................................................... 1-10
Components ................................................................................................................. 1-13
System Flush Procedure ............................................................................................. 1-16
Sweep And Final Charge ............................................................................................ 1-19
SECTION 2. COMPONENTS ..................................................................2-1
Compressor ................................................................................................................... 2-1
Condenser ..................................................................................................................... 2-2
ELECTRICAL SYSTEM ................................................................................................... 2-4
Testing The Compressor Direct ............................................................................. 2-4
Overload Protector ................................................................................................. 2-5
PTC Starting Device & Run Capacitor ........................................................................... 2-6
Run Capacitor ................................................................................................................ 2-7
Temperature Control ..................................................................................................... 2-8
Auto Damper Control .................................................................................................. 2-10
Defrost Timer ............................................................................................................... 2-13
Defrost Heater And Thermostat ..................................................................................... 2-14
Condenser Fan Motor ................................................................................................. 2-17
Freezer Fan Motor ....................................................................................................... 2-18
SECTION 3. CABINET AND RELATED COMPONENTS ......................3-1
FOOD LI ER .................................................................................................................. 3-1
COMPARTME T ACCESSORIES/MOU TI G HARDWARE ........................................ 3-1
Shelves................................................................................................................... 3-1
Freezer Shelves...................................................................................................... 3-1
Cantilever (Fresh Food) Shelves ........................................................................... 3-1
Cantilever Shelf Trim ............................................................................................. 3-2
Crisper Shelves ...................................................................................................... 3-2
Refrigerator Meat Keeper ...................................................................................... 3-2
Freezer Cold Controls ............................................................................................... 3-4
REPLACI G THE FREEZER CO TROL ACTUATOR ARM A D TAPE ......................... 3-5
MOU TI G HARDWARE ............................................................................................... 3-5
ylon Snap uts ....................................................................................................... 3-5
Water Drain Systems ................................................................................................ 3-6
CABI ET DOORS A D ASSOCIATED PARTS .............................................................. 3-6
Paint Touch-Up ......................................................................................................... 3-6
CONTENTS iii

2002 Maytag Corporation

Outer Door Panel ..................................................................................................... 3-7
Cabinet Wheels ....................................................................................................... 3-8
Cabinet Leveling...................................................................................................... 3-8
Door Seal ................................................................................................................ 3-9
Door Alignment ...................................................................................................... 3-10
Door Switch......................................................................................................... 3-10
SECTION 4. ICE MAKER ...................................................................... 4-1
Servicing ..................................................................................................................... 4-1
Accessing The Control Box ....................................................................................... 4-2
Service Procedures .................................................................................................... 4-2
Water Fill Adjustments ............................................................................................... 4-4
Water Problems .......................................................................................................... 4-5
Thermostat ................................................................................................................. 4-5
Shut-Off Arm .............................................................................................................. 4-6
Harness ....................................................................................................................... 4-6
Leveling Of Ice Maker ................................................................................................ 4-7
Removing Fill Cup ...................................................................................................... 4-7
Other Information ....................................................................................................... 4-8
SECTION 5. TROUBLESHOOTING...................................................... 5-1
SECTION 6. SPECIFICATIONS ............................................................ 6-1
TOP MOUNT
19 CUBIC FT (AUTO DAMPER) .................................................................................. 6-2
21 CUBIC FT (AUTO DAMPER) .................................................................................. 6-3
SECTION 7. SCHEMATICS ................................................................... 7-1
Dual Slide Control Models ..................................................................................7-2- 7-4
.
Contents iv

2002 Maytag Corporation
SECTION 1. GENERAL INFORMATION
s WARNING
!
Per onal Injury Hazard
Electrical ground is required on this
appliance.
SECTION 1. ENERAL INFORMATION 1-1
INSTRUCTIONS -
ELECTRICAL REQUIREMENTS
!
Per onal Injury Hazard
s WARNING
!
Do not under any circumstances
remove the grounding prong from
the power supply cord.
s WARNING
!
Per onal Injury Hazard
GROUNDING INSTRUCTIONS:
This appliance is equipped with a power
supply cord having a 3-prong grounding
plug. For your safety, this cord must be
plugged into a mating 3-prong type wall
receptacle which is properly wire ,
groun e an polarize .
If a mating wall receptacle is not avail-
able. Contact a qualified electrician to
have the wall receptacle replaced. Do
not use an AC adapter plug. If there is
any question, local building officials or
electrical utility should be consulted
To prevent unnecessary risk of fire,
electrical shock or personal injury, all
wiring and grounding must be done
in accordance with National Electrical
Code and local codes and ordinances.
It is the personal responsibility and
obligation of the appliance owner to
provide adequate electrical service
for this appliance.
IMPORTANT SAFETY
PRECAUTIONS:
Electrical Service
Grounding: 120 VOLTS, 60Hz Only
Observe all electrical co es an local
co es an or inances.
A 120 volt 60 Hz, 15 ampere fused electri-
cal supply is required. An individual
branch (or separate circuit serving only
this appliance is recommended.)
Do not use extension cord .
Before plugging in power cor , oper-
ating or testing, follow groun ing
instructions in Groun ing Section.

2002 Maytag Corporation

1-2 SECTION 1. ENERAL INFORMATION
FORCED AIR SYSTEMS
On all forced air models, an air circulating
fan draws air from around the evaporator
and directs it to the fresh food and freezer
compartments. A carefully measured
amount of chilled air is directed into the
fresh food compartment through a baffle
to maintain the desired fresh food com-
partment temperature. The greater part
of chilled air is directed into the freezer
compartment to maintain freezer tem-
perature. Forced air models use a fan
cooled condenser. The evaporator is
automatically defrosted every eight or ten
hours of compressor run time depending
on the model. Defrosting is accom-
plished by a defrost heater activated by a
timer. The accumulated moisture is
drained into a defrost pan located in the
compressor area of the cabinet.
AIR FLOW - FORCED AIR SYSTEMS
The balance between air flow into the
fresh food and freezer compartments is
an important factor in maintaining proper
compartment temperatures in a forced air
refrigeration system. A baffle is used to
regulate the amount of chilled air directed
into the fresh food compartment. If a
colder freezer compartment temperature
is desired, the baffle is adjusted so that
less air is directed into the fresh food
compartment. This causes the compres-
sor to run longer since the thermostat
sensing element is located in the fresh
food compartment. Cold air is drawn
through the fin and tube evaporator and
into the fan. A portion of the air is de-
flected into the fresh food compartment
where it absorbs heat and returns to the
fin and tube evaporator through the

2002 Maytag Corporation
SECTION 1. ENERAL INFORMATION 1-
return opening in the back center of the
fresh food, freezer divider. Most of the air
moving through the fin and tube evapora-
tor, however, is blown through the freezer
air tunnel and circulated throughout the
freezer compartment and back across the
fin and tube evaporator where it starts
another cycle.
CHECKING OPERATION
The following general information ex-
plains several methods for checking
operation of the refrigeration system.
This information applies to all systems
covered in this manual. The correct
operation of a refrigeration system is
dependent upon the proper functioning
of each of the parts comprising the sys-
tem.
If the system does not operate properly
(long run periods, warmer than normal
temperatures), the trouble may be caused
by one of the following conditions:
(1) - Restricte Capillary Tube
The opening of a capillary tube is about
the same diameter as the period at the
end of this sentence. This should indi-
cate that it doesn't take much to restrict
this tube. It should also tell you to use
care when any service procedures in-
volve moving or touching the capillary
tube. A very slight kink can cause a
complete restriction of the tube.
Restrictions of the capillary tube may be
caused by: (1) moisture freeze-up, (2)
foreign particles lodged in the tube, or (3)
a bend or kink.
If the capillary tube is restricted, there will
be a noticeable lack of frost on all of the
cooling surface; the compressor may
operate for a short period of time and
cycle on the overload. Because some
models can hold the entire charge in the
condenser, the compressor may run
continuously and definite vacuum will be
noticed in the low side. When moisture
freeze-up causes a restriction, it usually
occurs at the outlet end of the capillary
tube. ormally, frost buildup can be
detected in this area.
At the discharge end of the capillary,
apply heat. (NOTE: When using a heat
gun or hair ryer, use low heat.) If there
is enough head pressure, and if the re-
striction is caused by moisture freeze-up,
you will be able to hear a gurgling noise
as the heat releases the refrigerant
through the tubing.
It is possible that this moisture will be
absorbed by the drier and remedy the
trouble. However, if the freeze-up reoc-
curs, you must replace the drier.
A kink in the capillary tube will reveal
about the same symptom as a moisture
freeze-up except for the accumulation of
frost. Check the capillary tube in areas
that are possible, and straighten the kink
to relieve the restrictions. Check the unit
operation to see if you have helped the
situation. If the trouble persists, replace
the defective part. If the freeze-up condi-
tion does not exit and there is not a kink,
you can assume that a foreign particle is
causing the restrictions. The only rem-
edy in this case is to replace the re-
stricted part.

2002 Maytag Corporation

1- 4 SECTION 1. ENERAL INFORMATION
(2) - Partial Restriction In Low Si e
Tubing
Bent tubing, foreign matter, or moisture
in the system may cause a partial restric-
tion in the low side tubing. This is usually
indicated by frost-free tubing between
the restriction and the capillary tube and
by frost-covered tubing between the
restriction and the suction line. The
restriction acts like a second capillary
tube, increasing the pressure ahead of it
(warming) and decreasing the pressure
beyond it (cooling). To confirm the exist-
ence of a restriction in the low side tub-
ing, perform operational pressure checks.
(3) - Slow Leak In System
On forced air models, long run time will
be noticed during the early stages of a
leak. As the refrigerant continues to
escape, both compartments will gradually
warm up and the compressor will run
continuously. The freezer will probably
warm up first.
(4) - Incorrect Refrigerant Charge
The sealed unit may have too much
refrigerant (overcharged system) or too
little refrigerant (undercharged system).
The paragraphs below will inform you on
how to recognize a system with these
defects.
An overcharged system may have a frost
back condition appearing outside the
insulation sleeve on the suction line at the
cabinet rear. When the compressor
stops, the frost melts and drips on the
floor. A heat exchanger separation will
also cause this symptom.
An undercharged system depending on
the degree of undercharge, will operate
with temperatures above normal and the
compressor run time will be increased.
The greater the undercharge, the higher
the temperature will be and the longer
the run time.
An undercharged system must be
purged, evacuated, and recharged with
the proper amount of refrigerant. Before
recharging, however, test for refrigerant
leaks.